Bleed Pressure-Regulator Valve of the Engine 1 not Fully Closed

TASK 36-11-00-810-823-A
Bleed Pressure-Regulator Valve of the Engine 1 not Fully Closed

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 36-11-16-000-001	Removal of the Bleed Regulated Pressure-Transducer
AMM 36-11-16-400-001	Installation of the Bleed Regulated Pressure-Transducer
AMM 36-11-34-000-001	Removal of the BMC
AMM 36-11-34-400-001	Installation of the BMC
AMM 36-11-52-000-040	Removal of the Bleed Pressure-Regulator Valve
AMM 36-11-52-400-040	Installation of the Bleed Pressure-Regulator Valve
AMM 36-11-52-720-001	Functional Test of the Opening of the Bleed-Pressure Regulator Valve (PRV) with the Bleed Test Set P/N 98D36003000000

3. Fault Confirmation
Subtask 36-11-00-710-426-B ** ON A/C NOT FOR ALL

A. Test
(1) Do the test of the bleed pressure-regulator valve AMM 36-11-52-720-001.

4. Fault Isolation
Subtask 36-11-00-810-065-B ** ON A/C NOT FOR ALL

A. If the fault symptom is identified by the maintenance message:
PRESS REG-V 4001HA1
and if the bleed pressure-regulator valve is not fully closed:

(1) If the indication is correct (0 psig) with no air supply:

do a check for ground at pin A/5 of the bleed pressure-regulator valve (4001HA).

(a) If there is no ground signal:

repair the wiring between pin A/5 of the bleed pressure-regulator valve (4001HA) and the ground terminal.

1 If the fault continues:

(b) If there is a ground signal:

1 If there is no ground signal:

do a check and repair the wiring between the BMC1 (1HA1) to the bleed pressure-regulator valve (4001HA) pin AA/2B to pin A/5.

2 If there is a ground signal:

(2) If the indication is not correct with no air supply:

replace the XDCR-BLEED REGULATED PRESS, ENG 1 [8HA1] AMM 36-11-16-000-001 and AMM 36-11-16-400-001.

Subtask 36-11-00-710-079-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:42 UTC